363520

Appears in sequences

• Expansion of 1/(1 - 2*x + 2*x^2 - 2*x^3).at n=30A077943
• Expansion of 1/(1+2*x+2*x^2+2*x^3).at n=30A077993
• Number of (2+1) X (n+1) arrays of permutations of 0..n*3+2 with each element having directed index change 1,0 0,-1 1,2 or -1,1.at n=15A264585